What does it mean to describe a scientist as skeptical

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader